基于群体平衡模型的石油沥青质絮凝机理  

Asphaltenes flocculation mechanism based on population balance modeling

作　　者：程亮 袁永文[1] 朱秀雨 杜胤 何伟荣 贾碧霞 刘新亮[3] 王明[4] CHENG Liang;YUAN Yongwen;ZHU Xiuyu;DU Yin;HE Weirong;JIA Bixia;LIU Xinliang;WANG Ming(Drilling and Production Technology Research Institute,PetroChina Qinghai Oilfield Company,Dunhuang,Gansu,736202,China;No.2 Oil Extraction Factory,PetroChina Qinghai Oilfield Company,Dunhuang,Gansu,736202,China;Advanced Chemical Engineering and Energy Materials Research Center,China University of Petroleum(East China),Qingdao,Shandong,266580,China;State Key Laboratory of Heavy Oil Processing,China University of Petroleum(East China),Qingdao,Shandong,266580,China)

机构地区：[1]中国石油青海油田公司钻采工艺研究院,甘肃敦煌736202 [2]中国石油青海油田公司采油二厂,甘肃敦煌736202 [3]中国石油大学(华东)高端化工与能源材料研究中心,山东青岛266580 [4]中国石油大学(华东)重质油国家重点实验室,山东青岛266580

出　　处：《天然气与石油》2023年第4期86-92,共7页Natural Gas and Oil

基　　金：中央高校基本科研业务费(21CX06007A)。

摘　　要：石油沥青质的絮凝会导致石油在生产、加工和运输过程中出现许多严重问题。不同根据地以及储存条件下沥青质组成差别很大,且絮凝机理尚不明确,很难根据现场情况选择合适的沥青质沉积抑制剂。为研究石油沥青质的絮凝机理,对沥青质絮凝动力过程进行实验探索并利用群体平衡模型进行数值模拟,实现对沥青质絮体粒径、结构及强度的调控以及对絮凝系统的预测。实验研究了沥青质浓度、甲苯与正庚烷溶剂体积比和剪切速率对絮凝过程的影响,同时在群体平衡模型中引入絮体结构模拟絮凝过程。实验结果表明沥青质颗粒絮凝过程主要受剪切速率的影响,考虑了絮体结构变化的群体平衡模型模拟结果更为准确。研究结果对解决石油生产、运输和加工过程中的沥青质的聚沉问题具有现实指导意义。The flocculation of petroleum asphaltenes poses significant challenges in the production,processing,and transportation of petroleum products.However,the asphaltene composition varies widely in different production sites and storage conditions,and the mechanism behind the flocculation is not well understood.This makes it difficult to select the appropriate asphaltene deposition inhibitor according to the field conditions.To gain a better understanding of the flocculation mechanism of petroleum asphaltenes,we conducted experimental research on the dynamic process of asphaltene flocculation and developed a population balance modeling for numerical simulation,aiming to regulate the size,structure,and strength of asphaltene flocs and predict their behavior in the flocculation system.The effect of asphaltene concentration,the volume ratio between toluene and n-heptane solvents,and the shear rate on the flocculation were studied.At the same time,the floc structure was introduced into the population equilibrium model to simulate the flocculation process.The experimental results show that the flocculation process of asphaltene particles is mainly affected by the shear rate;and the population balance model,which considers changes in floc structure,provides more accurate results.With the population equilibrium model,we are able to effectively simulate the evolution of flocs particle size over time during the asphaltene flocculation process.The results of this research will contribute valuable strategies to address the challenges posed by asphaltene flocculation in oil production,transportation,and refining processes.

关 键 词：沥青质 絮凝 群体平衡模型 

分 类 号：TE62[石油与天然气工程—油气加工工程]